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Nat Gopalswamy, Sachiko Akiyama, Seiji Yashiro, Hong Xie, Pertti Mäkelä and Grzegorz Michalek Anomalous expansion of coronal mass ejections during solar cycle 24 and its space weather implications Geophysical Research Letters 41

Article first published online: 16 APR 2014 | DOI: 10.1002/2014GL059858

Key Points

  • Cycle 24 CMEs expand anomalously due to the reduced ambient pressure
  • The expansion results in weak ICME magnetic field, hence weak magnetic storms
  • Weak ambient magnetic field reduces efficiency of SEP acceleration by shocks

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